Coupling and yoke.



. BLACKMORE.

GOUPLING AND Yom.

v APPLIOATN FILED AUG. l, 1908. v 1,022,652, Patented Apr. 9, 1912.

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wlrNEssEs lNvEm-oa v l v @MLM l wapmmw W. BLACKMORE.

COUPLING AND YOKE.

APPLIOATION FILED AUG. 1, 190s.

Patented Apr. 9, 1912.

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IVILLIAIVI BLAOKMORE, 0F CLEVELAND, OHIO, ASSIGNOR TO TGHE NATIONAL MALLE- ABLE CASTINGS COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

COUPLING AND YOKE.

Specification of Letters Patent.

Patented Apr. 9, 1912.

To all whom t may concern Be it known that I, WILLIAM Bnioinronn, of Cleveland, in the county of Cuyahoga and State of Ohio, have invented a new and useful Improvement in Couplers and Yokes, of which the following is a specification, reference being had to the accompanying drawings, forming partof this specification, in which- Figure 1 is a side elevation of part of the coupler. shank and the yoke attached together; Fig. 2 is a bottom plan view of Fig. l; Fig. 3 is a side elevation showing a modified construction; Fig. 4 is a plan view of Fig. 3;-Fig. is a plan view, partly in section, on the line V-LV' of Fig. 4; Fig. 6 is a side elevation showing another modification; Fig.7 is a bottom'plan view thereof; Fig. 8 is a top plan view with the holding pin removed and Fig. 9 is a detail plan view of the forward end of the yoke.

Heretofore in the attachment ofthe yoke to the coupler shank in some kinds of draft rigging it has been sought' not only to relieve the rivets of the yoke from pulling strains by providing the arms of the yoke at their forward ends with inwardly projecting lips which engage on their rear side with the liner block of the coupler shank, but also-to relieve-the rivets from buiiing strains by providing lugs on the coupler shank which engage with the forward sides of the' lips of the yoke; but the protection which this has given has proved to be inadequate, for the lips on the forward side do not extend a greater distance than the level of the liner blocks, and when longitudinal stress is applied to the yoke the tendency is to bend the lips.

The purpose of my invention is to obviate this difficulty and otherwise to provide a strong and simple attachment between the coupler shank and the yoke.v

The preferred form of my invention is illustrated in Figs. l and 2, in which 1; is the coupler shank and 2 is the yoke. The yoke at Vthe forward end ofeach arm has an inwardly and forwardly shaped lip 3' approximately of Lform, and the coupler shank, on its top and bottom, has an L- shaped recess 4 which is adapted to .fit approximately the L-shaped lip The re cess 4 lies between the forward surface 51 of the liner block of the coupler shankand use the ordinary system of riveting.

the'opposite lug 6, which projects outwardly and rearwardly from the coupler shank and in advance of the liner block. The dimensions of the recess are such that the surface of the liner block and the surfaces 6 and 6a of the lug 6 fit the lip 3 of the yoke and the lip 3 extends transversely the entire width of the yoke, thus affording a broad and substantial bearing surface; but I prefer to provide a sufficient clearance between the lip 3 and the other surfaces of the recess, as shown in Fig. 1, so that if there should be any lack of uniformity in the casting of the coupler shank the lip or yoke can still be inserted withinthe'recess 4; The bearingv of the lip 3 against the surfaces 5, 6 and 6a makes a very secure connection between the lyoke and the coupler shank, both in buing and pulling, and makes it unnecessary to Instead of the ordinary rivets I prefer to use a pin 7 which is inserted through one of the lordinary holes in the-yoke and liner block and is retained in place by a cotter 7 I prefer, however, .to provide the coupler shank as heretofore, with the ordinary rivet holes, so that if at any time the specially constructed yoke illustrated in the drawings is not obtainable, an ordinary yoke can be appliedto the coupler, the lips 3 of the yoke tting within the recesses 4 and the yoke being held to the'coupler shank by the ordinary rivets.

In the modification shown in Figs. 3-5 I enlarge the recess 4 so as to provide a space between the surface 5 ofthe liner block and the rear side of the lug 3, in which 'space a transverse wedge-shaped key 8 can be inserted after the yoke has been put in place. The surface 5f is transversely inclined in order to match the inclined side of the wedge, and when the wedge has been driven its smaller vend can be upset, as at 8', in order to retain the wedge in place. The

wedge, being thus interposed between the the arms of the yokewith recesses 9 into .which lprojections 10 on the lug dit. When the parts are assembled the increased distance between the surfaces 5 and 6 enables the lip to be inserted at the rear of the recess 4 and moved transversely until the sides of the yoke are in alinement with the sides of the coupler shank. The yoke can then be pushed Jorivardly, so as to bring` the recesses 9 and projections 10 into eni gagement, whereupon the parts :1re firmly secured together by driving and upsetting the Wedge 8, as above described.

In the modification shown in Figs. 6-9

l the construction is similar to that shown in l Figs.4 l and 2, except that the holding pin 7El of the lugs 6 is passed through the lugs 6 and the for- 'Wardly projecting portions 'of the lips 3.

,innf'ardly and then forwardly, and the coupler shank having a recess also extending inwardly und then forwardly, said lip and recess having angular interitting portions which prevent relative lateral movement of the coupler and yoke; substantially as described.

2. The combination in :i draw bar, of a couplerzi yoke having inturned ends extending4 into recesses in the coupler, means Jfor preventingspreading of the yoke, and distance pieces to force the yoke into snug 'engagement with such means. 

